THE DATA-DRIVEN ALARM SYSTEM FOR THE CERN PS ACCELERATOR COMPLEX

The accelerator equipment is driven by a set of Object-Oriented softwa re modules, arranged in a class hierarchy. An equipment class, when ca lled with the equipment identifier and the selector ''alarm'', will re turn the operational status of the piece of equipment. This is impleme nted by inheritance of the ALARM class by the equipment class, on top of its normal inheritance. The ALARM class itself is database-driven, with all data derived from entries in a relational database which are down-loaded when the modules are installed. On any operator console, a Motif based application can be called which scans any subset of the e quipment for alarms and displays the relevant alarm information. The o perator can request detailed information about the equipment and the a larm status and can try to reset the equipment.